My mechanic said I needed an alternator. He fixed the sta...

Q: My mechanic said I needed an alternator. He fixed the starter now My car is making this loud knocking noise, what could it be?

asked by on May 16, 2017

There is a loud knocking noise on the driver's side under the hood when the car is turned on and when the gas pedal is pushed upon acceleration.

My car has 230000 miles.
My car has an automatic transmission.

Hi there. I believe we answered your question earlier, but if the mechanic is telling you that you need an alternator, it’s possible the noise and the power issue is related. The alternator, like many other accessory systems is powered by a serpentine belt. The belt is driven by a series of pulley’s. and when they wear out, a ticking noise is one of the most common symptoms. Again, without being there to complete an inspection, any repair suggestions would be guesses on our part and not very responsible on our behalf. I really believe it is best for you to seek a second opinion by having one of our mobile mechanics complete the car is making a noise inspection. You can click this link to set up the service if you’d like.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Brake pressure problems

One of the most common causes of the brake pedal going to the floor is a loss of brake fluid. Generally, this is easy to detect due to the fact that there is usually brake fluid leaking on the ground...

Slight engine vibrations

Hello. If the engine is running a little rough after all of this work was done it can be something as small as a vacuum leak or it can be caused by a valve seat that was not installed correctly....

My car has no power, won't start, and won't take jump start - 2006 Cadillac DTS

Hello. The more issues you have like sparking and excessive heat while trying to charge the battery, the more likely you are to damage it. Since it is brand new, do not attempt to jump start it again until you...

Related articles

The Best Used Cars to Buy If You’re a Caterer
If If you are in the catering business, you need a reliable vehicle that will provide you with what you need to transport your food, linens, and other supplies. Generally speaking, you're better off buying gently used, because you will...
A Buyer’s Guide to the 2012 Chrysler Town & Country
While While the Chrysler Town & Country has been in production for over half a century, the 2012 Chrysler Town & Country is anything but old-fashioned. The model got a huge overhaul in 2011 and saw a few new upgrades...
Chrysler Certified Pre-Owned (CPO) Car Program
If If you are shopping for a used Chrysler vehicle, you may want to check out cars under their certified pre-owned program. Many manufacturers have a certified pre-owned (CPO) program, and each one is set up differently. Read on to...